AMD Instinct MI455X vs Intel Arc B370 Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark comparisons between the AMD Instinct MI455X and the Intel Arc B370. The AMD Instinct MI455X has no benchmark entries in the database, while the Intel Arc B370 has a single recorded result. This absence of overlapping test data makes a conventional performance comparison impossible from direct measurements alone.

The Intel Arc B370 posts a 3DMark Steel Nomad DX12 score of 1184. This places it in the 5th percentile of all GPUs tracked by the database. Its nearest rivals in the database are all legacy mobile and desktop parts from the ATI and AMD Radeon HD era. The ATI Mobility Radeon HD 5570 scores 1186, a delta of -0.2 percent relative to the Arc B370. The ATI Radeon HD 5770 scores 1190, a delta of -0.5 percent. The AMD Radeon HD 7650M scores 1192, a delta of -0.7 percent. The AMD FirePro M2000 scores 1168, a delta of 1.4 percent. The Arc B370 therefore sits within a narrow band of roughly 2.5 percentage points across all four nearest rivals, with the FirePro M2000 being the only one it leads by a meaningful margin.

The AMD Instinct MI455X has an average benchmark score of 0 and a percentile rank of 50. With no recorded benchmark results, the database shows it as statistically uncharacterized. The 50th percentile figure is a neutral placeholder, not a measured performance outcome. The wins counters for both parts are zero, confirming that no head-to-head matchups exist in the dataset.

Where Each One Wins

Without shared benchmark data, the win breakdown must be inferred from the architectural and specification records. The AMD Instinct MI455X is built for compute density. Its FP32 throughput is listed at 157.3 TFLOPS, and its FP16 throughput matches at 157.3 TFLOPS with a 1:1 ratio. Texture rate reaches 2,457.6 GTexel/s, and memory bandwidth is 23.3 TB/s across a 24576-bit bus. The Intel Arc B370 delivers 6.144 TFLOPS FP32 and 12.29 TFLOPS FP16 with a 2:1 ratio. Its texture rate is 96.00 GTexel/s, and its pixel rate is 48.00 GPixel/s.

The Arc B370 wins in any scenario involving graphics output. It has display outputs, classified as portable device dependent, and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Instinct MI455X has no display outputs and lists all APIs as N/A. The data clearly indicates the Arc B370 is the only one of the two that can render to a screen or run consumer graphics workloads.

The Instinct MI455X wins in raw compute throughput by orders of magnitude. Its shading units number 32,768 against 1,280 for the Arc B370. Texture mapping units stand at 1,024 versus 40. The Instinct has no ROPs, while the Arc has 20. The Instinct also carries 10 ray tracing cores on the Arc side, while the Instinct lists none. For memory, the Instinct has 432 GB of HBM4, while the Arc uses system shared memory with system dependent bandwidth.

The use-case split is stark. The Instinct MI455X is a server accelerator with no graphics path. The Arc B370 is an integrated graphics processor with full API support and a 25 W TDP, suited for portable devices. The data shows no overlap in intended workloads.

Architecture Differences

The two chips come from different foundries and process nodes. The AMD Instinct MI455X uses a 2 nm process at TSMC and contains 320,000 million transistors on a die size of 2990 mm². Transistor density is 107.0M per mm². The Intel Arc B370 uses a 3 nm process at Intel, with transistor count and die size listed as unknown.

The Instinct MI455X is built on CDNA 5.0 architecture and belongs to the Instinct (MIx) generation. Its chip is the MI450 256CU. The Arc B370 uses Xe3-LPG architecture and belongs to the Arc Graphics-M (Panther Lake) generation. Its chip is Panther Lake. These are fundamentally different design philosophies: CDNA 5.0 targets massive parallel compute, while Xe3-LPG targets low-power integrated graphics.

Memory architecture differs completely. The Instinct uses 432 GB of HBM4 with a 24576-bit bus width and 23.3 TB/s bandwidth. Memory clock is 1900 MHz, 7.6 Gbps effective. The Arc B370 has no dedicated memory; it uses system shared memory with system dependent bandwidth. This means the Arc's performance scales with the host system's memory configuration, while the Instinct has a fixed, dedicated memory pool.

Clock behavior also differs. The Instinct has a base clock of 1000 MHz and a boost of 2400 MHz. The Arc B370 has a base of 300 MHz and a boost of 2400 MHz. Both parts reach the same boost ceiling, but the Arc starts much lower. The Instinct's power envelope is 2300 W TDP with a suggested PSU of 2700 W. The Arc B370 draws 25 W TDP and has no suggested PSU listed. The slot width for the Instinct is EAM Module, while the Arc is IGP. The Instinct uses PCIe 6.0 x16, while the Arc uses an IGP bus interface.

The Arc B370 has 10 ray tracing cores, while the Instinct lists none. The Arc also has 20 ROPs, whereas the Instinct has zero. The Instinct's pixel rate is 0 MPixel/s, confirming it does not perform rasterization. The Arc's pixel rate is 48.00 GPixel/s. The Instinct's texture rate is 2,457.6 GTexel/s, while the Arc's is 96.00 GTexel/s. The FP16 ratio also differs: the Instinct runs 1:1 with FP32, while the Arc runs 2:1, doubling FP16 throughput relative to FP32.

Release dates differ. The Intel Arc B370 launched on 2026-01-26. The AMD Instinct MI455X launched on 2026-07-22. The Arc B370 has a production status of Active, while the Instinct has no production status listed. The Instinct's predecessor is Radeon Instinct, while the Arc has no predecessor listed.

FAQ

Q: Which GPU has a higher FP32 compute throughput?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32, while the Intel Arc B370 delivers 6.144 TFLOPS FP32. The Instinct is roughly 25 times higher in this metric.

Q: Does the Intel Arc B370 support ray tracing?

A: Yes, the Arc B370 has 10 ray tracing cores. The AMD Instinct MI455X lists no ray tracing cores.

Q: What memory does each GPU use?

A: The Instinct MI455X uses 432 GB of HBM4 with a 24576-bit bus and 23.3 TB/s bandwidth. The Arc B370 uses system shared memory with system dependent bandwidth.

Q: Can either GPU output to a display?

A: Only the Intel Arc B370 has display outputs, listed as portable device dependent. The AMD Instinct MI455X has no outputs and supports no graphics APIs.

Q: What is the power draw difference?

A: The Instinct MI455X has a TDP of 2300 W and suggests a 2700 W PSU. The Arc B370 has a TDP of 25 W and lists no PSU requirement.

Q: How does the Arc B370 compare to its nearest rivals?

A: The Arc B370 scores 1184 in 3DMark Steel Nomad DX12. Its nearest rival, the ATI Mobility Radeon HD 5570, scores 1186, a delta of -0.2 percent. The ATI Radeon HD 5770 scores 1190, a delta of -0.5 percent. The AMD Radeon HD 7650M scores 1192, a delta of -0.7 percent. The AMD FirePro M2000 scores 1168, a delta of 1.4 percent.

Specification Differences

| Field | AMD Instinct MI455X | Intel Arc B370 |

|---|---|---|

| Architecture | CDNA 5.0 | Xe3-LPG |

| Generation | Instinct (MIx) | Arc Graphics-M (Panther Lake) |

| Process Node | 2 nm | 3 nm |

| Foundry | TSMC | Intel |

| Transistors | 320,000 million | unknown |

| Die Size | 2990 mm² | unknown |

| Transistor Density | 107.0M / mm² | null |

| Base Clock | 1000 MHz | 300 MHz |

| Boost Clock | 2400 MHz | 2400 MHz |

| Memory Size | 432 GB | System Shared |

| Memory Type | HBM4 | System Shared |

| Memory Bus Width | 24576 bit | System Shared |

| Memory Bandwidth | 23.3 TB/s | System Dependent |

| Memory Clock | 1900 MHz 7.6 Gbps effective | System Shared |

| Shading Units | 32768 | 1280 |

| TMUs | 1024 | 40 |

| ROPs | 0 | 20 |

| Ray Tracing Cores | null | 10 |

| Pixel Rate | 0 MPixel/s | 48.00 GPixel/s |

| Texture Rate | 2,457.6 GTexel/s | 96.00 GTexel/s |

| FP32 | 157.3 TFLOPS | 6.144 TFLOPS |

| FP16 | 157.3 TFLOPS (1:1) | 12.29 TFLOPS (2:1) |

| TDP | 2300 W | 25 W |

| Slot Width | EAM Module | IGP |

| Power Connectors | None | None |

| Suggested PSU | 2700 W | null |

| Bus Interface | PCIe 6.0 x16 | IGP |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Production Status | null | Active |

| Release Date | 2026-07-22 | 2026-01-26 |

| Predecessor | Radeon Instinct | null |

| Percentile vs All GPUs | 50 | 5 |

| Average Benchmark Score | 0 | 1184 |

The Verdict

The data shows two devices with no meaningful overlap. The AMD Instinct MI455X is a 2300 W accelerator with 432 GB of HBM4, 32,768 shading units, and 157.3 TFLOPS FP32. It has no display outputs, no graphics APIs, and no recorded benchmarks. Its 50th percentile rank is a placeholder, not a measured outcome. This part exists for server-side compute workloads where raw throughput and memory capacity dominate.

The Intel Arc B370 is a 25 W integrated processor with 1,280 shading units, 10 ray tracing cores, and full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. Its single recorded benchmark score of 1184 places it in the 5th percentile, with nearest rivals from the HD 5000 and HD 7000 era. The delta range across those rivals is narrow, from -0.7 percent to +1.4 percent, indicating the Arc B370 sits right at the performance level of those older parts.

The choice between these two rests entirely on the workload. For any graphics rendering, display output, or consumer API requirement, the Arc B370 is the only option with the needed features. For any compute task that needs massive parallel throughput and dedicated memory, the Instinct MI455X is the only part with the capacity. The absence of head-to-head benchmarks means the database cannot rank them against each other directly, but the specification differences make the intended use cases unambiguous.